She co-founded Network Equipment Technologies. Later, she was the founder and CEO of Adaptive Corp, a maker of high-speed switches. She has provided seed financing to numerous successful start-ups including Pure Software, Pete's Brewing Company, AdForce and Selectica. Today, she is an active investor and currently serves on the board or advisory board of almost a dozen other start-ups. She has been featured on Forbes’ Midas Touch List, Fortune’s Most Powerful Women and Business Week’s Top 50 Business Women in America. MacLean currently is an advisor to Foundation Capital and serves on the faculty at Stanford University's Graduate School of Engineering. Her husband of 20+ years is Michael Clair, a cofounder of LAN switch manufacturer Synoptics and himself an active angel investor. "Between the two of them, they know everyone in Silicon Valley," says Andrew Rachleff, general partner at Benchmark Capital in Menlo Park, California.